/*
    This file is part of the substandard lisp implementation of Standard Lisp
    Copyright (C) 2011 Nicky Nickell

    substandard lisp is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

function std_de(a, env) {
  var fname = a[0];
  var params = a[1];
  var fn = a[2];

  if (params == T) {
    // throw some error
  }

  var func = new interpreted_function(fn, params, FTYPE_EXPR);

  env.functions.set(fname.prin1(), func);

  return fname;
}

/*---
name: de
arity: 3
rest: false
ftype: FTYPE_FEXPR

argument-types:
  - TYPE_ID
  - TYPE_PAIR | TYPE_BOOLEAN
  - CLASS_ANY

doc: |
  explaining what de is / how it is used!

tests: |
  (de foo (a) a) -> foo
  (foo 9) -> 9
  (de foo (a &optional b) (list a b)) -> foo
  (foo 1 2) -> (1 2)
  (foo 1) -> (1 NIL)
  (de foo (a &optional b c) (list a b c)) -> foo
  (foo 1 2 3) -> (1 2 3)
  (foo 1) -> (1 NIL NIL)
  (de foo (a &rest b) (list a b)) -> foo
  (foo 1) -> (1 NIL)
  (foo 1 2 3 4) -> (1 (2 3 4))
...*/
